Robertson/Roberson Group Time Tree: https://discover.familytreedna.com/groups/clan-donnachaidh/tree?subgroups=24716

Roberson and Robertson of Scotland to Virginia and Bledsoe Co TN
I-BY78405 > I-FT223253 > I-FT224850 Roberson YDNA branches BigY Oct 12, 2022
https://www.familytreedna.com/public/ClanDonnachaidh?iframe=ycolorized

https://en.wikipedia.org/wiki/Clan_Donnachaidh
Wars of Scottish Independence
The clan's first recognised chief, Donnchaidh Reamhar, "Stout Duncan", son of Andrew de Atholia (Latin "Andrew of Atholl"), was a minor land-owner and leader of a kin-group around Dunkeld,[11] Highland Perthshire, and as legend has it, an enthusiastic and faithful supporter of Robert I (king 1306–29 aka Robert the Bruce) during the Wars of Scottish Independence; he is believed to have looked after King Robert after the Battle of Methven in 1306.[citation needed] The clan asserts that Stout Duncan's relatives and followers (not yet known as Robertsons) supported Robert the Bruce at the Battle of Bannockburn in 1314.[8][12] His descendants became known (in English or Scots) as the Duncansons, or Gaelic Clann Dhònnchaidh, "Children of Duncan".[7] Duncan is believed to have been killed at the Battle of Neville's Cross and was succeeded by Robert, from who the Clan Robertson takes its name.[8] Robert's brother, Patrick, was the ancestor of the Robertsons of Lude who were the principal cadet branch.[8]